Holder for whetstones



Nov. 9, 1948. w; D. DUNN HOLDER FOR WHETSTONES Filed Jan. 12, 1948 INVENTOR.

BY I l/iZZzhm D. Damn I M ATTORNEY Patented Nov. 9, 1948 UNITED STATES OFFICE 2,453,207 HOLDER FOR WHETSTONES -WilliannD.:Dunn,Linden, NJJ.

Application January 12, 1948, Serial"No.-1;'839

(Gl. -12-l1) '9 Claims. '1

This invention relates to holders for whet stones and it has as an object to provide such a holder which will greatly facilitate the sharpening of a'tool on the whet stone held therein and which-willmake it possible for even an inexperienced person to produce an accurately ground cuttingedgeon tools, such for example, as chisels,

plane blades etc.

It is well known that a great many persons aretuna'ble to maintain an even pressure on both sides of ia'tool'blade while moving the blade over 'a' whet stone during a sharpening operation. this :inability frequently results in the wearing .away'of one .side of the blade more than the other orth'e wearing away of both sides more nthan thecenter portion of the blade, thereby producing an unevenly sharpened :tool.

Iam aware'that attempts have been made to solve this problem by providing a stone holder which will yield to uneven pressures but insofar as I am aware none of the constructions heretofore provided have been entirely satisfactory and commercially practicable.

This invention has as a primary object to provide an improved and simplified whet stone 1 h'older in'which the stone is permitted to yield to'unequal pressures of a tool thereon and in which the stone will have a rigidsupport in all of itspositions, as distinguished from a resilient support, and 'alsoin which the stone will have a rolling contact with its support, as distinguished from a 'pivotal contact. The rolling support'provided by this invention permits the stone toyieldto unequal pressures and provides .a control therefor which eliminates the teetertotter action which results from aplain pivotal support.

Many whet stones, especially those known as oil-stones, are made up of two grades of stone, tone .of relatively coarse grain for rapid grinding, and the other of relatively fine grain for apply- .ingafini'shed edge to the tool. These stones are .arrangedback to back so that the opposite faces .of the-composite stone are, respectively, coarse and fine.

Another object of this invention is to provide an .improved yieldable holder :for such a com- .posite .stone whereby the stone may be readily inverted, to place either face of the stone uppermost, without detaching the stone from its holder.

With .the .above and other objects in view, as --will hereinafter appear, the invention comprises .the devices, combinations,-and arrangements of ;parts.hereinafterset forthzan'd illustrated in the accompanying drawings of "a preferred "embodi- :ment of the invention, from which the several features "of the'invention and the advantagesattained thereby-will be readily understood by' those skilled'in the art.

'In the drawings,

Fig. 1=is a perspective view of my improved whet stone holder, showing a preferred formsof stone-inverting means.

Fig. 2' is an enlarged side view thereof, ipartly broken away.

:Fig. is aplan'view 'of the right'end of the holder shown in Figs. 1 and 2.

Fig. lisia left end View of 'the'holderrwith' the :whet stone'shown, in full and in dotted lines,

.in two operative positions.

Fig. dis a le'ften'd View oftheholderwithithe r-stone-shown, iin'full and in dotted lines, in two spositionstthroughwhich it is passed-while being modified"form*'of stone-inverting -means.

iFig -7 :is aright end'view'of the'modifiedaconstruction "disclosedzin Fig. 6 with parts thereof feshown' in the ;position"they occupy '"during .thezin- "version =of'the stone.

Referring more specifically to the drawings, and :first to the construction shown in Figs. 1 to'5,r'inclusive, the invention is-disclosed as com- Jpri'sing a :stamped sheet metal base including inner and 'outertelescopically arranged sections land $2,;I8S138C1liV61Y. The 'basesection lis provided in its upper wall 4 with a slot 3 which-is aligned with an aperture 4 in "the upper wall 72 of the-section 2. The-sections 1 and 2 are "ad- -justable lengthwise to accommodate stones of various lengths and are held in their adjusted 'positions-z-by "means of a clamp *bo1t15 :passing through :the aperture '4 *and slot "3 and :having .t'hreadedthereon a'Wing-nut 6. Punched*out'-'of the upper walls l and 2 and pressed upwaitdly therefrompare standards I? and 8, respectively, which support stone-gripping :clamps 9; Each clamp 8 comprises a sheetmetalvstrap likemem- "ber-havingazrear wall 10, provide'ci'with a horizontallytdisposed T-shapeds1ot Hyanda pair of "oil-set .curved' spring .arms 62 adapted -tofr'ic- 'ltionallygra-sp'the opposite side walls of .a whet stones. The clamps Q-are loosely attached-to the .upright standards .7 and=8 by rivets l3 freel-y passing through apertures in said standards "and through the "F-shaped slots *H in the walls I'O "of the clamps. ilthe outer head of each *rivet 13 P lies aagainst-thec'outer side of one of =-thestandards disposed heads while the other head I3 thereof slidingly engages the inner surface of the rear wall I of one of the clamps 9. As shown most clearly in Fig. 3, each clamp 9 is formed between the wall I0 and the stone gripping arms I 2 with an off-set portion I4, and with a seat I against which one end of the whet stone abuts. The off-set portion M- affords clearance between the end of the stone and the inner head I3 of the rivet I3.

Punched out of and pressed upwardly fromthe upper walls I and 2 of the base sections I and 2, respectively, are convex tracks or rockers l6 upon which the lower surface of the whet stone rests in all of the various angular positions of the stone. It will be understood that as the stone rocks from side to side, in response to unequal pressures applied thereto, the stone will roll on the rockers I6 as shown, for example, in dotted lines in Fig. 4, and will not pivot on the rivets I3 which will ride up and down in the vertically II of the T-shaped slots II. Thus the stone is permitted to yield to uneven pressures but is prevented from teetering, as it would if it were pivotally supported.

When it is desired to invert the stone, to use the other side thereof, the clamps 9 with the stone therein are lifted slightly and slid laterally from the position shown in full lines in Fig. 4 to the position shown in full lines in Fig, 5, the shanks of the rivets I3 sliding in the stems of the T-shaped slots II. From this position the unit, comprising the clamps and the stone, is turned counterclockwise about the pivots I3 through the position shown in dotted lines in Fig. 5 to a horizontal position opposite to that shown in full lines. The unit is then slid to the right to align the rivets I3 with the heads II of the T-shaped slots 1 I. The stone is then lowered onto the rockers l6 and is again ready for use, with the opposite face of the stone uppermost.

In the modified construction, the right end of which is shown in Figs. 6 and 7, the parts which are similar to those hereinbefore described are similarly designated. It is to be understood that the opposite end of the modified construction is similar to that shown. In this form, a standard is struck up from the upper wall of each base section. Hinged at El to the upper end of each standard 20, b hinge pins 22, is an extension plate 23 which, as shown in full lines in Fig, 6, normally lies horizontally and below the level of the upper surface of the whet stone so as to be out of the way during a tool sharpening operation. A stone-gripping clamp 24, generally similar to the clamps 9 hereinbefore described, is mounted on each standard 26 by a. rivet the shank of which passes freely through a vertically disposed slot 26, formed partly in the standard .20 and partly in the hinged extension plate 23.

Normally, the stone S rests upon the arcuate support I6 and rocks back and forth thereon as above described.

' When it is desired to invert the stone, the stone is lifted vertically, carrying with it the clamps 24 and the rivets 25. The outer head of the rivets pass upwardly between the hinge portions 423 of the plates 23 and cause the plates to be elevated to the position indicated in dotted lines in Fig. 6. When the shanks of the rivets 25 have reached the upper end of the slots 26 the stone S and the clamps 24 may be rotated about the axes of the rivets to invert the stone, after which it is again lowered upon the rockers I6.

From the foregoing, it will be apparent that I this invention has provided a simple and inexpensive support for whet stones in which the stone may roll or rock to adapt itself to unequal pressures applied to opposite sides thereof and having lost-motion connections by means of which the stone readily may be inverted without removing it from its holder.

Having thus set forth the nature of the invention, what I claim herein is:

1. A whet stone holder comprising a base; a pair of stone-holding members movably mounted on said base; and at least one convexly curved member carried by said base and underlying a whet stone held in said members and afiording a rolling support for said stone.

2. A whet stone holder comprising a base; a pair of standards rising from said base; a pair of stone-holding members movably mounted on said standards; and a pair of convex rockers carried by said base and affording a rolling support for a whet stone held in said members.

3. A whet stone holder comprising a lengthwise adjustable two-part sheet metal base; means for securing the two parts of the base together in adjusted positions; an upright standard struck up from each base part; a stone-gripping member movably mounted on each of said standards; and a curved rocker carried by each of said base parts and engaging the underside of a whet stone held in said members.

4. A whet stone holder comprising a lengthwise adjustable sheet metal base including two telescopically arranged sheet .metal sections having aligned apertures; a clamp bolt passing through said apertures for securing said sections together in adjusted positions; an upright standard struck up from each of said base sections;'a stone-gripping member movably mounted on each of said standards; and an arcuate rocker struck up from each of said base sections and forming a rolling support for a whet stone held in said members.

5. A whet stone holder comprising a sheet metal base; a pair of standards supported by said base; a sheet metal stone-holding member movably mounted on each of said standards; and a plurality of convex rockers carried by said base and forming a rolling support for a whet stone held in said members.

6. A whet stone holder comprising a base; a pair of standards supported by said base; a stone-gripping member mounted on each of said standards for limited vertical and horizontal movements; and a pair of convex rockers projecting upwardly from said base and engaging the underside of a whet stone held in said members and affording a rolling support for the stone.

7. A whet stone holder comprising a base; a pair or standards supported by said base; a stone-gripping member permanently attached'to each of said standards; a pair of rockers carried by said base and normally affording a rolling support for a whet stone held in said members;

' and a lost motion connection between each of said members and its supporting standard to permit said members and the stone carried thereby to be shifted relative to said base and standards to an inoperative position in which said stone and memtact with each of said standards, each of said members having formed therein a'horizontally disposed T-shaped slot and each of said standards carrying a rivet passing through the slot of its associated stone-gripping member; and a pair of rockers carried by said base and forming a rolling support for a whet stone held in said members; said members and stone being shiftable laterally relative to said base, rockers and standards sufficiently to permit said stone and members to be inverted without interference with said rockers and base.

9. A whet stone holder comprising a base; a pair of standards supported by said base; a stonegripping member permanently but loosely riveted to each of said standards; a pair of rockers carried by said base and normally affording a rolling support for a whet stone held in said members; an extension plate hinged to the upper end of each of said standards and adapted to be swung to a position in which it projects above the upper face of said stone, said standards and their respective extension plates being formed with vertic-ally aligned slots through which pass the rivets which secure the stone-gripping members to said standards; said slots and rivets affording 10stmotion connections between said stone-gripping members and said standards to permit the members and the stone therein to be shifted to an inoperative position in which the stone and members may be inverted and thereafter-returned to operative position.

WILLIAM D. DUNN.

No references cited. 

